Will It Run AI

Can Phi-4 Mini Reasoning 4B run on RX 6600 8GB?

YES — Runs Great

S92Excellent
Estimated from fit model

Phi-4 Mini Reasoning 4B needs ~5.5 GB VRAM. RX 6600 8GB has 8.0 GB. With Q4_K_M quantization, expect ~51 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: Very lowStack: StandardBottleneck: Memory bandwidth
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Operating mode

Choose the run profile you care about

Interactive favors responsiveness, while light API and scale-out lean harder on serving readiness. The fit stays the same, but the recommendation lens changes.

Current mode

Balanced

Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.

Capabilities:

Select quantization to explore

Q4_K_M (Medium quality) — 5.5 GB, 50.9 tok/s, Runs well
5.5 GB required8.0 GB available
69% VRAM used

Fit status

Runs well

Decode

50.9 tok/s

TTFT

3803 ms

Safe context

43K

Memory

5.5 GB / 8.0 GB

Memory breakdown

Weights2.3 GB
KV Cache1.5 GB
Runtime0.9 GB
Headroom0.8 GB

See how fast it feels

See how fast it feelsPhi-4 Mini Reasoning 4B on RX 6600 8GB
1st promptCold start — includes initialization
>Solve: If a train travels at 60 mph for 2.5 hours, how far does it go?
Let me work through this step by step. Given information: - Speed = 60 mph (miles per hour) - Time = 2.5 hours Formula: Distance = Speed x Time Calculation: Distance = 60 mph x 2.5 h = 150 miles The train travels 150 miles. Double-check: at 60 mph the train covers 60 miles each hour. In half an hour it covers 30 miles. So in 2.5 hours: 60 + 60 + 30 = 150 miles. Confirmed.
2nd promptWarm — model ready, no init overhead
>What if the train stops for 20 minutes halfway?
The stop doesn't change the total distance covered while moving, but it affects total trip time. Breakdown: - First half: 1.25 hours at 60 mph = 75 miles - Stop: 20 minutes (no distance) - Second half: 1.25 hours at 60 mph = 75 miles Total distance: 150 miles (same) Total time: 2.5 h + 0.33 h = 2.83 hours Average speed: 150 / 2.83 = 53 mph The distance stays the same but average speed drops to 53 mph because of the stop.
Estimated: 50.9 tok/s decode · 3.8s TTFT (warm) · 127 tok/s prefill

What limits this setup

This setup is broadly balanced for this model.

No major red flags

This recommendation has enough memory headroom and acceptable estimated speed for the selected workload.

Best improvement path

Performance by workload

WorkloadGradeFitDecodeTTFTContext
ChatSRuns well50.9 tok/s2075 ms43K
CodingSRuns well50.9 tok/s3803 ms43K
Agentic CodingSTight fit50.9 tok/s5532 ms43K
ReasoningSRuns well50.9 tok/s4495 ms43K
RAGSTight fit50.9 tok/s6915 ms43K

Quantization options

How Phi-4 Mini Reasoning 4B (3.799999952316284B params) fits at each quantization level on RX 6600 8GB (8.0 GB usable).

QuantBitsVRAMQualityFit
Q2_K
2
1.5 GB
LowS88
Q3_K_S
3
1.9 GB
LowS89
NVFP4
4
2.1 GB
MediumS89
Q4_K_M
4
2.3 GB
MediumS89
Q5_K_M
5
2.7 GB
HighS90
Q6_K
6
3.1 GB
HighS91
Q8_0Best for your GPU
8
4.1 GB
Very HighS90
F16
16
7.8 GB
MaximumF0

Get started

Copy-paste commands to run Phi-4 Mini Reasoning 4B on your machine.

Run

ollama run phi4-mini

Your hardware

More models your RX 6600 8GB can run

ModelParamsGradeDecodeCapabilities
AlibabaQwen 3.5 9B9BA11.5 tok/s
AlibabaQwen 3.5 4B4BS48.4 tok/s
AlibabaQwen 3 8B8BA14.9 tok/s

Frequently asked questions

Can RX 6600 8GB run Phi-4 Mini Reasoning 4B?

Yes, RX 6600 8GB can run Phi-4 Mini Reasoning 4B with a S grade (Runs well). Expected decode speed: 50.9 tok/s.

How much VRAM does Phi-4 Mini Reasoning 4B need?

Phi-4 Mini Reasoning 4B (3.799999952316284B parameters) requires approximately 5.5 GB of memory with Q4_K_M quantization.

What is the best quantization for Phi-4 Mini Reasoning 4B?

The recommended quantization for Phi-4 Mini Reasoning 4B is Q4_K_M, which balances quality and memory efficiency.

What speed will Phi-4 Mini Reasoning 4B run at on RX 6600 8GB?

On RX 6600 8GB, Phi-4 Mini Reasoning 4B achieves approximately 50.9 tokens per second decode speed with a time-to-first-token of 3803ms using Q4_K_M quantization.

Can RX 6600 8GB run Phi-4 Mini Reasoning 4B for coding?

For coding workloads, Phi-4 Mini Reasoning 4B on RX 6600 8GB receives a S grade with 50.9 tok/s and 43K context.

What context window can Phi-4 Mini Reasoning 4B use on RX 6600 8GB?

On RX 6600 8GB, Phi-4 Mini Reasoning 4B can safely use up to 43K tokens of context. The model's official context limit is 131K, but available memory constrains the safe maximum.

See all results for RX 6600 8GBSee all hardware for Phi-4 Mini Reasoning 4B
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